I have a small but very hard bump on the back of my neck/shoulder. It is about about 1cm in diameter and sticks out enough to be visible about an inch to the right of my top thoracic vertebrae. I noticed it several days ago. It is not sore but hurts to the touch and has shown no signs of going away. I haven t been to a doctor yet but was told it could be a lymph node. No history of endocrine disease, no active infection that I know of. I have had irregular hormone levels for the past year or so and my prolactin was very elevated when it was checked a few months ago but a cause has not been found.I m just wondering whether this is something I should be concerned about and make an appointment for or something to just wait out.